FfmpegAudioRenderer fails to correctly handle channel layout changes in MPEG-TS streams

[kiall]

Possibly related to / a regression of #2111

Issue description

When FfmpegAudioRenderer is used for decoding an AC3 audio track, and that track's channel layout changes abruptly (as is common on MPEG-TS streams during commercial breaks etc), audio and video begins to stutter.

It's possible this isn't AC3 specific, but I don't have any other samples available to verify.

Reproduction steps

• Add provided sample into the demo player media.exolist.json, example:

    {
      "name": "AC3 Audio Layout Change (TS)",
      "uri": "http://10.5.1.21/ac3-channel-layout-change.ts"
    },
  

• Build the demo app, with the ffmpeg extension enabled.

• Play the sample, wait for approx 1:01 and observe stuttering.

Link to test content

https://www.dropbox.com/s/0uvzypw9ckusnqr/ac3-channel-layout-change.ts?dl=0

Version of ExoPlayer being used

• ExoPlayer r2.2.0
• FFmpeg git sha 6c7a0876fefdd3c919afcabf493492cb4946ca6a

Device(s) and version(s) of Android being used

Reproduces on:

• Android TV Emulator - v7.1.1
• nVidia Shield - Android 7.0, Shield SW 5.1 (24.28.403.124)

A full bug report captured from the device

https://www.dropbox.com/s/py4bpiqds4pbb3g/bugreport-NYC-2017-03-12-22-55-21.zip?dl=0

[kiall]

It's also worth noting that if the audio is allowed to passthrough to the TV attached to the shield for decoding (and downmixing to 2 channel), the sample plays back fine.

[kiall]

FYI - I'll be travelling, and away from any Android TV dev stuff starting Friday for 2 weeks - any responses needed will be slow, apologies.

Let me know if you need anything and I'll do my best!

[kiall]

Hey guys, anything you need from me to confirm this issue etc? Thanks!

[AquilesCanta]

Sorry for the delay on this. I think I know what the issue might be. I'll run some tests and update this issue.

[kiall]

Awesome, thanks @AquilesCanta :)

[AquilesCanta]

A fix will be available in the next push.

[ojw28]

Fixed in dev-v2. Please give it a try!

[kiall]

And, validated it works nicely! Thanks :)